# app.py  –  BizIntel AI Ultra (Gemini 1.5 Pro, selectable date column)

import os
import tempfile
import pandas as pd
import streamlit as st
import google.generativeai as genai

from tools.csv_parser import parse_csv_tool
from tools.plot_generator import plot_sales_tool
from tools.forecaster import forecast_tool  # must accept date_col param

# ──────────────────────────────────────────────────────────────
# 1.  GEMINI CONFIG  (1.5‑pro, temperature 0.7)
# ──────────────────────────────────────────────────────────────
genai.configure(api_key=os.getenv("GEMINI_APIKEY"))
gemini = genai.GenerativeModel(
    model="gemini-1.5-pro-latest",
    temperature=0.7,
    top_p=0.9,
    response_mime_type="text/markdown",
)

# ──────────────────────────────────────────────────────────────
# 2.  STREAMLIT PAGE SETUP
# ──────────────────────────────────────────────────────────────
st.set_page_config(page_title="BizIntel AI Ultra – Gemini 1.5 Pro", layout="wide")
st.title("📊 BizIntel AI Ultra – Advanced Analytics Pipeline")

TEMP_DIR = tempfile.gettempdir()

# ──────────────────────────────────────────────────────────────
# 3.  CSV UPLOAD
# ──────────────────────────────────────────────────────────────
csv_file = st.file_uploader("Upload a CSV file (≤ 200 MB)", type=["csv"])
if not csv_file:
    st.info("⬆️  Upload a CSV to begin.")
    st.stop()

csv_path = os.path.join(TEMP_DIR, csv_file.name)
with open(csv_path, "wb") as f:
    f.write(csv_file.read())
st.success("CSV saved to temporary storage ✅")

# Preview first rows for column selection
df_preview = pd.read_csv(csv_path, nrows=5)
st.dataframe(df_preview)

# ──────────────────────────────────────────────────────────────
# 4.  DATE COLUMN CHOICE
# ──────────────────────────────────────────────────────────────
date_col = st.selectbox("Choose the date/time column for forecasting", df_preview.columns)

# ──────────────────────────────────────────────────────────────
# 5.  RUN LOCAL TOOLS
# ──────────────────────────────────────────────────────────────
with st.spinner("Parsing CSV…"):
    summary_text = parse_csv_tool(csv_path)

with st.spinner("Generating sales trend chart…"):
    trend_msg = plot_sales_tool(csv_path)  # creates sales_plot.png

with st.spinner("Forecasting future metrics…"):
    forecast_text = forecast_tool(csv_path, date_col=date_col)  # ← passes chosen column

# ──────────────────────────────────────────────────────────────
# 6.  GEMINI 1.5‑PRO STRATEGY (stream)
# ──────────────────────────────────────────────────────────────
prompt = f"""
You are BizIntel Strategist AI.

**CSV SUMMARY**